Item 656632 model 0903000.
Garden roof felt.
Roofing felt is most commonly used for the waterproofing of non habitable garden buildings such as cabins or sheds.
Also known as tar paper roofing felt originated in finland in the 1870 s as a waterproofing underlayment for roofs.
This grade of roof felt was the cheapest i could find for re roofing a large shed.
Later asphalt was used in the manufacture of roofing felt.
Today glass fiber or polyester fabric may be used instead of paper.
Ideal for an apex flat or pent roof shed felt and roofing membrane are durable and perfect for a newly built structure or to re cover existing roofing material.
Roofing felt is essential to ensure your outbuilding is ready for all weathers by providing a waterproof cover to the building s roof.
Make sure you have enough roof felt you don t want to have to stop mid way through the project to buy more felt.
It is typically used as an underlay that sits between the surface it is being applied to and the final layer of roofing material.
A conventional roll of felt is enough for 432 square feet.
Since you will have overlap between rows this works out to a total coverage area of 400 square feet the dimensions of a 20 x 20 roof.
Next grade up was 50 more expensive and the next grad up from that was 100 more expensive.
First paper was impregnated with coal tar.